Diodes Incorporated AP2820BM-G1

Overview

AP2820BM-G1 from BCD Semiconductor is a high-side power distribution switch with active-high enable and open-drain FLAG output, designed for USB-compliant hot-plug power control. It features 60 mΩ R_DS(ON), 2.0 A continuous load capability, under-voltage lockout (2.5 V typ), and integrated over-current, thermal, and short-circuit protection with fold-back. Used in notebook USB hubs and self-powered bus architectures to enforce voltage-drop compliance and fault reporting.

For engineers reviewing the AP2820BM-G1 datasheet, AP2820BM-G1 pinout, AP2820BM-G1 application, or AP2820BM-G1 equivalent, this device supports precise current-limited USB port power switching with deglitched fault signaling, soft-start control, and low-quiescent supply current (75 μA typ) - critical for embedded system power sequencing and USB 2.0 compliance validation.

Technical Context

The AP2820BM-G1 integrates an N-channel MOSFET with charge-pump gate drive to maintain low on-resistance across its 2.7–5.5 V input range. Its active-high EN pin directly interfaces with 3.3 V/5 V logic without level-shifting, and the open-drain FLAG pin asserts low after 5–15 ms delay upon OCP or OTP detection.

It implements fold-back current limiting during output short-to-GND (1.18 A typ), thermal shutdown at 150 °C with 30 °C hysteresis, and reverse-current blocking when disabled. The SOIC-8 package provides θ_JA = 135 °C/W, supporting sustained 2.0 A operation within ambient limits of –40 to +85 °C.

Key Specifications

Pinout & Package

AP2820BM-G1 is housed in a standard SOIC-8 package (4.90 mm × 3.90 mm × 1.75 mm), RoHS-compliant and green (G1 suffix), with exposed pad not present. Pin layout matches JEDEC MS-012AC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side USB power switch applications.

Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2820BM-G1 uniquely delivers dedicated fault-flag signaling, fold-back current limiting, and USB-compliant R_DS(ON) in a minimal 8-pin SOIC - making it optimal for discrete, controller-agnostic USB power management where reliability and diagnostics are prioritized.

Availability

AP2820BM-G1 is available at Aetrix Electronics and suitable for USB bus-powered hubs, notebook peripheral ports, and self-powered USB docking stations requiring stable component supply, RoHS/Green compliance, and long-term industrial availability.

Supply support for AP2820BM-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC designer specializing in high-efficiency power management, USB interface, and automotive-grade solutions since 2003.

The AP2820 product line targets USB-compliant power distribution in portable and embedded systems, emphasizing low R_DS(ON), integrated protection, and qualification to UL/IEC60950-1 for end-equipment safety certification.

FAQ

What is the maximum continuous output current supported by AP2820BM-G1?

AP2820BM-G1 guarantees 2.0 A continuous output current under recommended operating conditions (VIN = 2.7–5.5 V, TA = –40 to +85 °C). This rating applies specifically to versions A/B/C/D - confirmed in Section 4 of the datasheet ordering table and validated by ILIMIT = 2.2–3.2 A with fold-back behavior during short-circuit events.

Does AP2820BM-G1 include reverse current blocking?

Yes - AP2820BM-G1 blocks reverse current when disabled, with leakage ≤1.0 μA when VOUT exceeds VIN. This is explicitly specified in the Electrical Characteristics table (Section 7) as "Reverse Current" parameter and ensures no backfeed into upstream sources during power-down or fault conditions.

How does the FLAG pin behave during over-temperature events?

The FLAG pin asserts low during both over-current and over-temperature faults, with identical 5–15 ms delay timing. Thermal shutdown triggers at 150 °C (TOTSD) and releases after hysteresis cools junction by 30 °C - verified in Section 7's "Thermal Shutdown Temperature" specification and Figure 26/27 waveforms.

Is AP2820BM-G1 compatible with 3.3 V logic control signals?

Yes - the EN pin accepts 3.3 V logic-high signals, as its VENH threshold is 1.6 V min (with 5.5 V absolute max), and input current remains ±1.0 μA across 0–5 V. This allows direct interfacing with 3.3 V microcontrollers without level-shifting, per Section 7's "Enable High Input Threshold" and "Enable Pin Input Current" specs.